我正在使用 PureVPN 应用程序 (openvpn/udp)。通过 rpm 文件安装。连接后，如果我ping youtbue.com显示：
--- youtube.com ping statistics ---
7 packets transmitted, 0 received, 100% packet loss, time 6149ms
但如果我 ping google.com 它将毫无问题地工作。
有些网站可以运行，有些则不能。
如果我使用浏览器（通过 RPM 安装的 Firefox 和 Brave），它们无法打开 youtube.com。
现在，如果我使用 flatpak 浏览器，它将毫无问题地打开 youtube.com。
我什至尝试了安装为 Flatpak 的 GNOME 盒子，并使用相同的 Fedora 34 作为主机，它将打开 youtube.com。
问题是什么？我该如何修复它？
ifconfig
...
tun0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1500
inet xxx.xx.xx.xxx netmask 255.255.255.224 destination xxx.xx.xxx.xx
unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 txqueuelen 100 (UNSPEC)
RX packets 103978 bytes 135509956 (129.2 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 61682 bytes 4764217 (4.5 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
...
journalctl -fu NetworkManager.service
May 09 20:31:49 fedora NetworkManager[844]: <info> [1620617509.2142] manager: (tun0): new Tun device (/org/freedesktop/NetworkManager/Devices/19)
May 09 20:31:49 fedora NetworkManager[844]: <info> [1620617509.2355] device (tun0): state change: unmanaged -> unavailable (reason 'connection-assumed', sys-iface-state: 'external')
May 09 20:31:49 fedora NetworkManager[844]: <info> [1620617509.2422] device (tun0): state change: unavailable -> disconnected (reason 'connection-assumed', sys-iface-state: 'external')
May 09 20:31:49 fedora NetworkManager[844]: <info> [1620617509.2437] device (tun0): Activation: starting connection 'tun0' (xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx)
May 09 20:31:49 fedora NetworkManager[844]: <info> [1620617509.2444] device (tun0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'external')
May 09 20:31:49 fedora NetworkManager[844]: <info> [1620617509.2453] device (tun0): state change: prepare -> config (reason 'none', sys-iface-state: 'external')
May 09 20:31:49 fedora NetworkManager[844]: <info> [1620617509.2529] device (tun0): state change: config -> ip-config (reason 'none', sys-iface-state: 'external')
May 09 20:31:49 fedora NetworkManager[844]: <info> [1620617509.2535] device (tun0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'external')
May 09 20:31:49 fedora NetworkManager[844]: <info> [1620617509.2559] device (tun0): state change: ip-check -> secondaries (reason 'none', sys-iface-state: 'external')
May 09 20:31:49 fedora NetworkManager[844]: <info> [1620617509.2564] device (tun0): state change: secondaries -> activated (reason 'none', sys-iface-state: 'external')
May 09 20:31:49 fedora NetworkManager[844]: <info> [1620617509.2585] device (tun0): Activation: successful, device activated.
traceroute youtube.com
traceroute to youtube.com (10.10.34.35), 30 hops max, 60 byte packets
1 _gateway (172.16.148.161) 110.442 ms 112.015 ms 112.743 ms
2 92.223.89.1 (92.223.89.1) 114.433 ms 115.302 ms 116.738 ms
3 10.255.8.182 (10.255.8.182) 118.095 ms 119.022 ms 10.255.8.181 (10.255.8.181) 120.942 ms
4 10.255.8.177 (10.255.8.177) 122.864 ms 124.759 ms 125.409 ms
5 149.6.67.153 (149.6.67.153) 127.591 ms 128.780 ms 129.219 ms
6 * * *
7 * * *
8 * * *
纯VPN日志：
Tue May 11 09:32:39 2021 WARNING: file '/etc/purevpn/login.conf' is group or others accessible
Tue May 11 09:32:39 2021 OpenVPN 2.4.4 x86_64-unknown-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [MH/PKTINFO] [AEAD] built on Dec 20 2017
Tue May 11 09:32:39 2021 library versions: OpenSSL 1.0.2g 1 Mar 2016, LZO 2.08
Tue May 11 09:32:39 2021 NOTE: the current --script-security setting may allow this configuration to call user-defined scripts
Tue May 11 09:32:39 2021 TCP/UDP: Preserving recently used remote address: [AF_INET]92.223.89.8:53
Tue May 11 09:32:39 2021 UDP link local: (not bound)
Tue May 11 09:32:39 2021 UDP link remote: [AF_INET]92.223.89.8:53
Tue May 11 09:32:39 2021 WARNING: this configuration may cache passwords in memory -- use the auth-nocache option to prevent this
Tue May 11 09:32:40 2021 WARNING: 'link-mtu' is used inconsistently, local='link-mtu 1557', remote='link-mtu 1550'
Tue May 11 09:32:40 2021 WARNING: 'cipher' is used inconsistently, local='cipher AES-256-CBC', remote='cipher AES-256-GCM'
Tue May 11 09:32:40 2021 WARNING: 'auth' is used inconsistently, local='auth SHA1', remote='auth [null-digest]'
Tue May 11 09:32:40 2021 WARNING: 'comp-lzo' is present in remote config but missing in local config, remote='comp-lzo'
Tue May 11 09:32:40 2021 [Secure-Server] Peer Connection Initiated with [AF_INET]92.223.89.8:53
Tue May 11 09:32:41 2021 TUN/TAP device tun0 opened
Tue May 11 09:32:41 2021 do_ifconfig, tt->did_ifconfig_ipv6_setup=0
Tue May 11 09:32:41 2021 /sbin/ifconfig tun0 xxx.xx.xxx.xxx netmask 255.255.255.224 mtu 1500 broadcast 172.16.148.191
Tue May 11 09:32:41 2021 /etc/purevpn/pure-resolv-conf tun0 1500 1552 172.16.148.163 255.255.255.224 init
dhcp-option DNS 92.223.89.10
dhcp-option DNS 92.223.89.12
Tue May 11 09:32:41 2021 Initialization Sequence Completed
在 Flatpak 上运行的虚拟机上执行 Ping 操作：
ping youtube.com
PING youtube.com (142.250.185.238) 56(84) bytes of data.
64 bytes from fra16s53-in-f14.1e100.net (142.250.185.238): icmp_seq=1 ttl=117 time=119 ms
64 bytes from fra16s53-in-f14.1e100.net (142.250.185.238): icmp_seq=2 ttl=117 time=119 ms
64 bytes from fra16s53-in-f14.1e100.net (142.250.185.238): icmp_seq=4 ttl=117 time=118 ms
64 bytes from fra16s53-in-f14.1e100.net (142.250.185.238): icmp_seq=5 ttl=117 time=118 ms